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Device for real time monitoring mine roof rock formation or concrete structure stability

A technology for real-time monitoring of concrete structures, applied in measurement devices, seismology for logging records, testing machinery, etc. Monitoring work and other issues, to achieve the effect of improving the intensity, avoiding the interference of environmental noise, and strong signal volume

Active Publication Date: 2009-02-11
西安西科测控设备有限责任公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although this method can directly measure the change of stress and strain, once it is buried, it cannot be changed. If the component fails, it cannot continue to measure
For projects without embedded stress and strain gauges, this monitoring work cannot be carried out
This monitoring method for reinforced concrete projects can detect changes in data only when obvious damage and plastic deformation have occurred, and it cannot be used for early prediction or safe processing—it is difficult to predict in time when the concrete structure will be destroyed. Roof fall and fracture accidents will occur, as well as the area and scale of possible accidents

Method used

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  • Device for real time monitoring mine roof rock formation or concrete structure stability
  • Device for real time monitoring mine roof rock formation or concrete structure stability
  • Device for real time monitoring mine roof rock formation or concrete structure stability

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] figure 1 It is a schematic diagram of the overall structure of the present invention, showing the overall structure of the present embodiment. The monitoring device is mainly composed of a microseismic signal transmission rod 1 , a microseismic signal sensing element 2 , and a microseismic signal acquisition and analysis host 3 .

[0040] When in use, according to the characteristics of the rock formation, drill a borehole with a diameter of 42 mm and a depth of 1 to 2 m (the depth is related to the lithology), drive the microseismic signal transmission rod 1 into the coal seam or rock formation, and place the microseismic signal transmission rod 1 outside the hole. A microseismic signal sensing element 2 is installed at one end, and the microseismic signal sensing element 2 is connected to the microseismic signal acquisition and analysis host 3, and connected to the ground central station microcomputer through an optical fiber or a metal cable.

[0041] The utility mo...

Embodiment 2

[0071] Embodiment 2 The microseismic (mine pressure dynamic) sensor is implemented in Shiyaodian Coal Mine, Shenmu County

[0072] Figure 4 Schematic diagram of the installation and layout of microseismic (mine pressure dynamic) sensors in Shiyaodian coal mine, Shenmu County:

[0073] The thickness of the coal seam in Shiyaodian Coal Mine is 7-8m. The roof is made of fine sandstone. The horizontal coal seam is difficult to fall due to the hard roof, so the room-and-pillar mining method is adopted. The hatched area in the figure is the goaf formed by the mining of coal seams in the mine. The goaf is about 3.6km long and nearly 2km wide. In August 2005, a roof monitoring system was installed in the mine. Four GDD-I microseismic (mine pressure dynamic) sensors 2 are respectively installed on the column. They are No. 3, No. 4, No. 5 and No. 6 microseismic (mine pressure dynamic) sensors 2 respectively. The sensor 2 is powered by an intrinsically safe power supply. A monitorin...

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Abstract

The invention relates to a device for monitoring the stability of roof strata of a mine or concrete engineering in real time. The device mainly comprises a microseism signal conduction rod, a microseism signal sensing element and a microseism signal collection and analysis host computer. The microseism signal collection and analysis host computer is provided with a filter circuit for filtering the affection of ambient noise signal, a rapid data sampling circuit and a professional diagnosis and analysis software for analyzing the stability of the roof strata of the mine or the concrete structure in real time by utilizing artificial intelligence technology. The device is suitable for coal mines or other mines, can be used for the stability monitoring of underground construction which adopting concrete bar and concrete as the materials, such as metro stations or tunnels, and can also be used for the stability monitoring of dams, bridges, tall buildings and mountain landslides. Through a set of technology of digital filtering recognition and collection for the microseism signal, the recognition rate for acoustic signal released during rock breaking can be improved above 80 percent, and the purpose of monitoring the stability of the roof strata of the mine or the concrete structure is well completed.

Description

technical field [0001] The invention relates to a monitoring device, in particular to a real-time monitoring device for the stability of the mine roof rock layer or the stability of the concrete structure. Background technique [0002] Mining ore from underground mines, especially when coal mines are mined underground, the roof of the coal seam in the mining area is often relatively hard and complete, and it is not easy to collapse. As big as several football fields. Because the coal seam under the hard roof is mined out, the pressure concentration phenomenon of the coal seam roof in the mining area is caused. When the strength of the concentrated stress exceeds the strength of the rock, the roof rock layer will break and collapse. This kind of sudden "roof fall" falls Rocks fill the goaf and compress the air in the goaf (there are a large number of residual coal seams left in the goaf, due to poor ventilation, toxic and harmful gases such as gas and carbon monoxide accumul...

Claims

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Application Information

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IPC IPC(8): G01N33/00G01N29/34E21C39/00G01V1/40
Inventor 苏燹
Owner 西安西科测控设备有限责任公司
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